Subject
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley42
- Pesticides -- Application -- Oregon -- Willamette River Valley40
- Grapes -- Diseases and pests -- Control -- Oregon14
- Spraying and dusting in agriculture -- Oregon13
- Viticulture -- Oregon12
- Fungicides -- Oregon11
- Pesticides -- Application -- Oregon10
- Pear -- Diseases and pests -- Control -- Oregon -- Willamette River Valley9
- Agricultural pests -- Control -- Willamette River Valley (Or.)8
- Apples -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Peach -- Diseases and pests -- Integrated control -- Oregon8
- Blueberries -- Diseases and pests -- Control -- Oregon -- Willamette River Valley7
- Fruit -- Diseases and pests -- Control -- Columbia River Valley7
- Peach -- Diseases and pests -- Control -- Oregon7
- Pesticides -- Application -- Columbia River Valley7
- Spraying and dusting in agriculture -- Columbia River Valley7
- Cherry -- Diseases and pests -- Integrated control -- Oregon -- Willamette River Valley6
- Eastern filbert blight -- Control -- Oregon -- Willamette River Valley6
- Hazelnuts -- Diseases and pests -- Control -- Oregon -- Willamette River Valley6